DOI: 10.1051/jp1:1993269
J. Phys. I France 3 (1993) 1245-1254
Static and Dynamic luminescence effects of Cr
-Tm
pairs
in YAG
V. Lupei1, L. Lou1, G. Boulon1, A. Lupei2 and C. Tiseanu2
1 Laboratoire de Physico-Chimie des MatMaux Luminescents , Universiti Lyon I, Bât. 205, 69622 Villeurbanne Cedex, France
2 Institute of Atomic Physics, 76900 Buchanst, Romania.
(Received 9 November 1992, revised 4 January 1993, accepted 14 January 1993)
Abstract
Luminescence emission of Tm
in YAG codoped with Cr
under selective (into
E Cr
levels or
F
Tm
levels) and nonselective (into
T
Cr
) excitation is dominated
by three new centers. Based on structural and spectral characteristics, these centers are associated
with the three possible perturbations produced by Cr3+ ions at the nearest neighbour
Tm
ions. A selective energy transfer within these Cr
-Tm
pairs is observed.
78.50 - 78.55
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